单词	electromagnet
释义	electromagnet /ɪˌlɛktrə(ʊ)ˈmaɡnɪt / noun Physics A soft metal core made into a magnet by the passage of electric current through a coil surrounding it.During braking, the metal wheels are exposed to a magnetic field from an electromagnet, generating eddy currents in the wheels.... Magnets, either conventional electromagnets or superconducting magnets, are placed along the accelerator tube at regular intervals. The mass acted upon by the coil elements can be a permanent magnet or magnets, or electromagnets.
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